How do I increase font size in mail on iPad before sending the message?

Len17 wrote:

Need to make font bigger for person who has poor vision who is receiving the message.

I don't think you can do anything about that at your end. But the recipient should be able to increase font size via some kind of accessibility settings. If the recipient is using Mail, the info is at

https://support.apple.com/en-us/HT202828

See this link --> Change the font size on your iPhone, iPad, and iPod touch - Apple Support

Len17 wrote:

How do increase the font sign in mail on iPad before sending the message?

What is the purpose of this? Are recipients complaining that the font in your message is too small to read?